[23]

Henslow says that the Centaurea with, Rays, nigrescens or decipiens is found in Hampshire to the exclusion of the other species. Thinks this latter fact is an argument that it is only var. of nigra is found everywhere.

Has cultivated it for 2 generations & has found it came true.—

Red Lychnis never in open fields.

(3)

[Stauffer, Natural selection, p. 125: "The Rev. Prof. Henslow informs me that this form kept true for two generations in his garden, but that in the fourth year it was clearly reduced to C. nigra. I mention this case, because, the var. C. nigrescens, as I am informed by Prof. Henslow occupies nearly the whole of Hampshire to the exclusion of the common forms; and here we have the argument from range, on a small scale, as with the Red Grouse of Britain, which may be used on either side."]